| Term | Definition |
| solid waste | Trash |
| biodegradable | (adj) Something that can decompose; something that can be broken down by natural processes |
| disposal | The act of getting rid of waste |
| decomposition | The process of dead stuff getting broken down into simpler pieces/molecules |
| landfill | A low area that is filled with solid waste and soil |
| incineration | Burning of waste |
| organism | a living thing |
| nutrient | a substance (element, molecule, etc) that organisms need to consume to live |
| methane | a gas that is produced by landfill decomposition (CH4) |
| global warming | the gradual warming of the planet that is caused by "greenhouse gases" in the atmosphere |
| compost | food/yard waste that decomposes to make rich soil |
| ecosystem | all the living and nonliving things that interact with each other in a given area |
| leachate | Water that percolates through a landfill, collecting waste chemicals along the way |
| biotic | (adj.) living |
| abiotic | (adj.) nonliving |